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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
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RhætianRhæ"ti*an (?), a & n. Rhetain.
List of Gallo-Rhaetian languages • List of Rhaetian languages • Rhaetian (disambiguation) • Rhaetian Alps • Rhaetian Railway • Rhaetian Railway ABe 4/16 • Rhaetian Railway ABe 4/4 I • Rhaetian Railway ABe 4/4 III • Rhaetian Railway ABe 8/12 • Rhaetian Railway G 4/5 • Rhaetian Railway Ge 2/2 • Rhaetian Railway Ge 2/4 • Rhaetian Railway Ge 3/3 • Rhaetian Railway Ge 4/4 I • Rhaetian Railway Ge 4/4 II • Rhaetian Railway Ge 4/4 III • Rhaetian Railway Ge 4/6 • Rhaetian Railway Ge 6/6 I • Rhaetian Railway Ge 6/6 II • Rhaetian Railway Gem 4/4 • Rhaetian Railway in the Albula / Bernina Landscapes
|Subdivision of the Triassic system according to the IUGS, as of July 2009.|
The Rhaetian is in geochronology the latest age of the Triassic period or in chronostratigraphy the uppermost stage of the Triassic system. It lasted from 203.6 ± 1.5 to 199.6 ± 0.6 million years ago. It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest age of the Jurassic).
The Rhaetian is named after the Rhaetian Alps, a mountain chain stretching over parts of eastern Switzerland, northern Italy and western Austria. The stage was introduced in scientific literature by Austrian geologist Eduard Suess and German paleontologist Albert Oppel in 1856.
The base of the Rhaetian did not yet have a unanimously agreed upon definition in 2009. In the Tethyan domain, the base of the ammonite biozone of Sagenites reticulatus is used, in the boreal domain (where this species is not found) the base of the biozone of Cochloceras amoenum is used instead. The base is also close to the first appearances of conodont species Misikella spp. and Epigondolella mosheri and radiolarite species Proparvicingula moniliformis.
|This section requires expansion. (May 2008)|
|Dinosaurs of the Rhaetian|
|Mammaliaformes of the Rhaetian|
|Lower/Early Triassic||Middle Triassic||Upper/Late Triassic|
|Induan | Olenekian||Anisian | Ladinian||Carnian | Norian